a good prosecuter will look at a thread like this and will use it as the "frame of mind" that the man in the article had when he decided to confront the intruder.

A "good" prosecutor will take into account all relevant evidence for and against a conviction and use it to to decide whether to prosecute, and how to prosecute. I don't think anyone would reasonably consider the opinions of complete strangers, from various places around the world, responding to an article in an internet chat room to be a a good indicator of the potential defendant's state of mind.